Assembly for Insulating a Door Curtain

Abstract

The present disclosure includes a system and article of manufacture for a door assembly for rolling and unrolling, or retracting and extending, a door curtain. The door assembly may include various mechanisms to protect a door curtain from wear and abrasion, as well as muffle noise associated with the operation of the door curtain. The door assembly may comprise a curtain shaft. A door curtain may roll and/or unroll (e.g., open and/or close) on the curtain shaft. The door assembly may further include an insulator shaft, which may receive or hold a door curtain insulator or insulators. A door curtain insulator may attach to the insulator shaft as well as the curtain shaft and/or door curtain itself. In operation, as the door curtain is rolled up, one or more lengths of insulator may be unrolled from the insulator shaft and layered, or interleaved, between consecutive layers of rolled up door curtain. Similarly, as the door curtain is unrolled, one or more lengths of insulator may be rolled up or wound about the insulator shaft, such that no insulator travels with the curtain as it unrolls towards a closed position. The door assembly may also include a mechanism for compensating for a difference between an angular speed of a door curtain on a curtain shaft and an angular speed of a door curtain insulator on an insulator shaft.

1 . A door assembly comprising:
 a curtain shaft for receiving a door curtain;   an insulator shaft for receiving a door curtain insulator;   a recoil assembly that compensates for a difference between an angular speed of the door curtain on the curtain shaft and an angular speed of the door curtain insulator on the insulator shaft.   
     
     
         2 . The door assembly of  claim 1 , wherein the recoil assembly compensates for the difference between the angular speed of the door curtain on the curtain shaft and the angular speed of the door curtain insulator on the insulator shaft by tensioning a spring that elastically couples the curtain shaft to the insulator shaft. 
     
     
         3 . The door assembly of  claim 1 , wherein the recoil assembly compensates for the difference between the angular speed of the door curtain on the curtain shaft and the angular speed of the door curtain on the insulator shaft by imparting a different angular speed to the insulator shaft. 
     
     
         4 . The door assembly of  claim 1 , wherein the recoil assembly is mounted between the curtain shaft and the insulator shaft. 
     
     
         5 . The door assembly of  claim 4 , wherein the recoil assembly comprises a spring. 
     
     
         6 . The door assembly of  claim 5 , wherein the spring engages a hub assembly at a first overbend and engages a sprocket assembly at a second overbend. 
     
     
         7 . A recoil assembly for compensating for a difference in angular speed between a door curtain and a door curtain insulator comprising:
 a recoil assembly sprocket;   a hub assembly that is coupled to an insulator shaft; and   a spring that is elastically coupled between the hub assembly and the recoil assembly sprocket.   
     
     
         8 . The recoil assembly of  claim 7 , wherein the recoil assembly sprocket is mechanically coupled to a curtain shaft by way of a drive sprocket and a drive coupling. 
     
     
         9 . The recoil assembly of  claim 7 , wherein the spring compensates for the difference between the angular speed of the door curtain and the angular speed of the door curtain insulator by tensioning in response to an angular speed of the door curtain that exceeds an angular speed of the door curtain insulator. 
     
     
         10 . The recoil assembly of  claim 7 , wherein the spring compensates for the difference between the angular speed of the door curtain and the angular speed of the door curtain insulator by releasing a tension in response to an angular speed of the door curtain that exceeds an angular speed of the door curtain insulator. 
     
     
         11 . The recoil assembly of  claim 7 , wherein the spring compensates for the difference between the angular speed of the door curtain and the angular speed of the door curtain insulator by imparting a greater angular speed to the insulator shaft. 
     
     
         12 . The recoil assembly of  claim 7 , wherein the spring is mounted between the hub assembly and the recoil assembly sprocket. 
     
     
         13 . The recoil assembly of  claim 7 , wherein the spring engages the hub assembly at a first overbend and engages a sprocket assembly at a second overbend. 
     
     
         14 . A kit comprising:
 a recoil assembly sprocket;   a hub assembly that is configured to be coupled to an insulator shaft; and   a spring that is configured to be elastically coupled between the recoil assembly sprocket and the hub assembly.   
     
     
         15 . The kit of  claim 14 , wherein the recoil assembly sprocket is configured to be mechanically coupled to a curtain shaft by way of a drive sprocket and a drive coupling. 
     
     
         16 . The kit of  claim 14 , wherein the spring is configured to compensate for a difference between an angular speed of a door curtain and an angular speed of a door curtain insulator by tensioning in response to an angular speed of the door curtain that exceeds an angular speed of the door curtain insulator. 
     
     
         17 . The kit of  claim 14 , wherein the spring is configured to compensate for a difference between an angular speed of a door curtain and an angular speed of a door curtain insulator by releasing a tension in response to an angular speed of the door curtain that exceeds an angular speed of the door curtain insulator. 
     
     
         18 . The kit of  claim 14 , wherein the spring is configured to compensate for a difference between an angular speed of a door curtain and an angular speed of a door curtain insulator by imparting a greater angular speed to the insulator shaft. 
     
     
         19 . The kit of  claim 14 , wherein the spring is configured to be mounted between the hub assembly and the recoil assembly sprocket. 
     
     
         20 . The kit of  claim 14 , wherein the spring is configured to engage the hub assembly at a first overbend and engage a sprocket assembly at a second overbend.